40006740 has 96 divisors (see below), whose sum is σ = 117218304. Its totient is φ = 10183680.

The previous prime is 40006739. The next prime is 40006741. The reversal of 40006740 is 4760004.

It is an interprime number because it is at equal distance from previous prime (40006739) and next prime (40006741).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254742 + ... + 254898.

It is an arithmetic number, because the mean of its divisors is an integer number (1221024).

Almost surely, 2^40006740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40006740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58609152).

40006740 is an abundant number, since it is smaller than the sum of its proper divisors (77211564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40006740 is a wasteful number, since it uses less digits than its factorization.

40006740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40006740 is about 6325.0881416783. The cubic root of 40006740 is about 342.0143969864.

Adding to 40006740 its reverse (4760004), we get a palindrome (44766744).

The spelling of 40006740 in words is "forty million, six thousand, seven hundred forty".